Spiritus Astrum [P0-B11]: p1505: Towards Early Access

I have spent this week making extensive improvements to the missions for the third campaign. The goal now is to add more content to them in the form of new mechanics and objectives, etc. Once this is done, I can add the artwork and story elements.

I have added new enemy types, as well as new placeholder art and objectives, etc.

I have also made several improvements to the combat system, and fixed several bugs, etc.

There were some issues that cropped up when creating large numbers of enemies at the same time, as well as some issues with placement and targeting within interiors, but these issues seem mostly solved now.